TalkingHeads Virus

 Virus Name:  TalkingHeads 
 V Status:    Viron 
 Discovered:  February, 1993. 
 Symptoms:    .COM file corruption; programs fail to function; message; 
              README.COM file created 
 Origin:      Unknown 
 Eff Length:  519 Bytes OW 
 Type Code:   ONCK - Overwriting Non-Resident .COM Infector 
 Detection Method:  NAV, ViruScan, F-Prot, AVTK, Sweep, IBMAV, 
                    NAVDX, VAlert, PCScan, ChAV, 
                    NShld, Sweep/N, NAV/N, AVTK/N, NProt, IBMAV/N, Innoc, 
 Removal Instructions:  Delete infected files 
 General Comments: 
       The TalkingHeads virus was submitted in February, 1993.  Its origin 
       or point of isolation is unknown.  TalkingHeads is a non-resident, 
       direct action infector of .COM programs, including COMMAND.COM.  It 
       permanently corrupts the .COM programs it infects. 
       When a program infected with the TalkingHeads virus is executed, this 
       virus will infect two .COM programs located in the current directory. 
       Also at this time, the virus will create a 519 byte file named 
       README.COM in the current directory, as create a 519 byte CHKDSK.COM 
       file in the C:\DOS directory if the file doesn't already exist. 
       Programs infected with the TalkingHeads virus will have the first 
       519 bytes of the host program overwritten by the virus' code.  There 
       will be no increase in file size unless the file was originally 
       smaller than 519 bytes in length, in which case it will become 519 
       bytes in length.  The program's date and time in the DOS disk 
       directory listing will not be altered.  The following text strings 
       can be found unencrypted within the viral code in all infected 
       The TalkingHeads virus may display the following message when an 
       infected program is executed on Fridays between 11:00 and 11:59: 
               "This ain't no disco..." 
       The virus doesn't always experience this behaviour.  The above 
       message is encrypted within the virus. 

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